/*
 *   Copyright 2012, Thomas Kerber
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
package milk.skimmed;

import java.util.ArrayList;
import java.util.List;

/**
 * Provides several methods give feedback to the user.
 * 
 * @author Thomas Kerber
 * @version 1.0.0
 */
public class Callback{
    
    /**
     * The CallbackInterfaces onto which calls are delegated.
     */
    private static List<CallbackInterface> delegateTo =
            new ArrayList<CallbackInterface>();
    
    /**
     * Adds a new CallbackInterface.
     * @param ci The interface to add.
     */
    public static void addCallback(CallbackInterface ci){
        delegateTo.add(ci);
    }
    
    /**
     * Issues an error.
     * @param error The error.
     */
    public static void issueError(String error){
        for(CallbackInterface ci : delegateTo)
            ci.issueError(error);
    }
    
    /**
     * Issues a warning.
     * @param warning The warning.
     */
    public static void issueWarning(String warning){
        for(CallbackInterface ci : delegateTo)
            ci.issueWarning(warning);
    }
    
    /**
     * Notifies the user about something.
     * @param notice The user notification.
     */
    public static void notifyUser(String notice){
        for(CallbackInterface ci : delegateTo)
            ci.notifyUser(notice);
    }
    
}
